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authorJean Delvare <khali@linux-fr.org>2009-12-09 20:35:55 +0100
committerJean Delvare <khali@linux-fr.org>2009-12-09 20:35:55 +0100
commit3f8b845940c8344e88123bead66b5a871e6366df (patch)
tree74afb7c7057510c889041d2cfbab7cb38868b1e3 /drivers
parentbab2bf44f80a5749fdf69f854247e912353142b2 (diff)
downloadop-kernel-dev-3f8b845940c8344e88123bead66b5a871e6366df.zip
op-kernel-dev-3f8b845940c8344e88123bead66b5a871e6366df.tar.gz
hwmon: (w83791d) Clean up detect function
As kind is now hard-coded to -1, there is room for code clean-ups. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Marc Hulsman <m.hulsman@tudelft.nl>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hwmon/w83791d.c60
1 files changed, 18 insertions, 42 deletions
diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
index 97851c5..0410bf1 100644
--- a/drivers/hwmon/w83791d.c
+++ b/drivers/hwmon/w83791d.c
@@ -1270,56 +1270,32 @@ static int w83791d_detect(struct i2c_client *client, int kind,
return -ENODEV;
}
- /* The w83791d may be stuck in some other bank than bank 0. This may
- make reading other information impossible. Specify a force=...
- parameter, and the Winbond will be reset to the right bank. */
- if (kind < 0) {
- if (w83791d_read(client, W83791D_REG_CONFIG) & 0x80) {
- return -ENODEV;
- }
- val1 = w83791d_read(client, W83791D_REG_BANK);
- val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
- /* Check for Winbond ID if in bank 0 */
- if (!(val1 & 0x07)) {
- /* yes it is Bank0 */
- if (((!(val1 & 0x80)) && (val2 != 0xa3)) ||
- ((val1 & 0x80) && (val2 != 0x5c))) {
- return -ENODEV;
- }
- }
- /* If Winbond chip, address of chip and W83791D_REG_I2C_ADDR
- should match */
- if (w83791d_read(client, W83791D_REG_I2C_ADDR) != address) {
+ if (w83791d_read(client, W83791D_REG_CONFIG) & 0x80)
+ return -ENODEV;
+
+ val1 = w83791d_read(client, W83791D_REG_BANK);
+ val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
+ /* Check for Winbond ID if in bank 0 */
+ if (!(val1 & 0x07)) {
+ if ((!(val1 & 0x80) && val2 != 0xa3) ||
+ ( (val1 & 0x80) && val2 != 0x5c)) {
return -ENODEV;
}
}
+ /* If Winbond chip, address of chip and W83791D_REG_I2C_ADDR
+ should match */
+ if (w83791d_read(client, W83791D_REG_I2C_ADDR) != address)
+ return -ENODEV;
- /* We either have a force parameter or we have reason to
- believe it is a Winbond chip. Either way, we want bank 0 and
- Vendor ID high byte */
+ /* We want bank 0 and Vendor ID high byte */
val1 = w83791d_read(client, W83791D_REG_BANK) & 0x78;
w83791d_write(client, W83791D_REG_BANK, val1 | 0x80);
/* Verify it is a Winbond w83791d */
- if (kind <= 0) {
- /* get vendor ID */
- val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
- if (val2 != 0x5c) { /* the vendor is NOT Winbond */
- return -ENODEV;
- }
- val1 = w83791d_read(client, W83791D_REG_WCHIPID);
- if (val1 == 0x71) {
- kind = w83791d;
- } else {
- if (kind == 0)
- dev_warn(&adapter->dev,
- "w83791d: Ignoring 'force' parameter "
- "for unknown chip at adapter %d, "
- "address 0x%02x\n",
- i2c_adapter_id(adapter), address);
- return -ENODEV;
- }
- }
+ val1 = w83791d_read(client, W83791D_REG_WCHIPID);
+ val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
+ if (val1 != 0x71 || val2 != 0x5c)
+ return -ENODEV;
strlcpy(info->type, "w83791d", I2C_NAME_SIZE);
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